4、In past years, I would often hit a roadblock in my attempts to teach children computer skills using an operating system most had at home.
2、But that's where I seem to hit a roadblock. 250,000 won't get me to central park west.
1、Most of the time, visitors leave because they've hit a roadblock: a problem that lets them go no further.
3、NASA's Phoenix Mars Lander has hit a roadblock while trying to scoop a sample of dirt into one of its ovens.
6、Meanwhile, plans to use regular power to restart the cooling system hit a roadblock when it turned out that cables had to be laid through turbine buildings flooded with the contaminated water.
5、When you're going through something truly difficult, or if you have hit a roadblock, you may just want to roll over and give up.
